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Table 2 Difference in chemical element contents of three main soil types in Heshun

From: Exploratory spatial data analysis for the identification of risk factors to birth defects

Soil types High content Average content low content
leached cinnamon soil Co Pb Cu Ni Cr Zn Mn As F Hg Cd
cinnamon soil Pb Ni Cr Zn Mn Hg Cd As Co F Cu  
brown soil As F Hg Cd Co Pb Ni Cr Zn Mn Cu
  1. * High content elements refers to the contents 10% above average and low contents refers to contest 10% below the average in Shanxi province. (Data source: Chongwen SHI et al. 1996)